My pond DB tripped yesterday. Luckily I was watching the fish and saw the waterfall stop.
Got me scared as I have redundancy everywhere, but on the main DB - which is something I don't expect to just trip for no reason.
Bought me this thing to mount on my DB box.
It will scream bloody murder if the DB loses power.
With a phone dialer, it can also call me wherever I am to report the emergency.
http://www.drumalarm.com/power%20fail%20alarm-PFA5.html
